Darwin info

I'm interested in doing some work on Darwin using LLVM. I have two questions before getting started:

(1) Has anyone compiled the Darwin kernel with llvm-gcc, and if so what is the latest version that has been compiled?

(2) Are there any specific books or online docs you would recommend, other than the docs that come with the public Darwin software?

Thanks,

--Vikram
http://www.cs.uiuc.edu/~vadve
http://llvm.cs.uiuc.edu/

I'm interested in doing some work on Darwin using LLVM. I have two
questions before getting started:

(1) Has anyone compiled the Darwin kernel with llvm-gcc, and if so
what is the latest version that has been compiled?

My last attempt to build ppc darwin kernel failed. However,
that bug was fixed last week. I have not yet tried
with building kernel again with the fix.

(2) Are there any specific books or online docs you would recommend,
other than the docs that come with the public Darwin software?

"Mac OS X Internals" by Amit Singh is a good book for low level stuff.